Marko Zec - Network emulation using the virtualized network stack in FreeBSD





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Uploaded on Aug 18, 2010

Abstract: The capability of running multiple isolated network stack instances has been recently added to the FreeBSD kernel. In this talk we will discuss how a virtualized network stack can serve as a foundation for constructing a scalable network topology emulation platform. Each of the virtual nodes in an emulated network maintains a private view of networking state: link-layer, IPv4 and / or IPv6 addresss and routes, TCP machinery, IPFW, IPSEC etc., while being able to running an independent instance of existing unmodified applications and tools ranging from traffic generators or analyzers to routing protocol daemons or web servers. Virtual nodes can be interconnected into arbitrary topologies using FreeBSD's netgraph subsystem, making the platform suitable for a wide range of network experimentation and testing scenarios.

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